well, without getting drawn up into the ethics argument I think is ready to ensue..

the lower your bow weight, the more you have to depend on momentum for clean kills...

I shoot a 52lb bow and use a 700+ grain arrow...

why? just because I want to make sure I poke two holes in a deer or black bear... makes recovery easier.

would I demand someone else use this set-up? No. Why? Because it's what I choose to use, and it's not going to work for everyone.